Reviewed by Darin.

        * JavaScriptCore.exp: Changed to export C++ binding for
        WTF::releaseFastMallocFreeMemory() instead of C binding for
        releaseFastMallocFreeMemory().
        * wtf/FastMalloc.cpp: Moved definitions of
        releaseFastMallocFreeMemory() to be in the WTF namespace
        regardless whether FORCE_SYSTEM_MALLOC is defined.
        * wtf/FastMalloc.h: Moved releaseFastMallocFreeMemory() from
        extern "C" binding to WTF::releaseFastMallocFreeMemory().



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@35055 268f45cc-cd09-0410-ab3c-d52691b4dbfc